CN114215366A - Lifting construction method for dense hanging points of large-span arched roof - Google Patents
Lifting construction method for dense hanging points of large-span arched roof Download PDFInfo
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- CN114215366A CN114215366A CN202111635345.0A CN202111635345A CN114215366A CN 114215366 A CN114215366 A CN 114215366A CN 202111635345 A CN202111635345 A CN 202111635345A CN 114215366 A CN114215366 A CN 114215366A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/142—Means in or on the elements for connecting same to handling apparatus
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
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- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a construction method for lifting dense hanging points of a large-span arched roof. Secondly, the lifting unit is used for carrying out accumulated lifting for multiple times according to the roof curvature and the distribution condition of the lower civil engineering floor, and lifting point positions are arranged according to the principle of close lifting point arrangement after the range of the accumulated lifting area is divided. The invention solves the problem of horizontal thrust which is difficult to process by a conventional method in the construction process of the large-span arch structure, avoids the complicated process of adding the stay cable, and simultaneously provides a close hanging point arrangement mode of the shoulder-pole type lattice lifting frame, which can effectively reduce the replacement of rod pieces, improve the butt joint precision of the structure and reduce the measure cost; in addition, the structure assembling height is reduced, the jig frame measure quantity and the high-altitude operation quantity are reduced well, and the construction safety is guaranteed.
Description
Technical Field
The invention relates to the technical field of construction of building steel structures, in particular to a construction method for lifting dense hanging points of a large-span arched roof.
Background
With the development of modern society, building structure types are changing day by day, and the large-span arch structure is more and more applied to public buildings due to the functionality and the aesthetic property. While the structural design is becoming mature, how to form the structure safely and efficiently is a urgent necessity. The conventional construction mode of the large span structure mainly comprises hoisting, lifting and sliding, and for an arch structure, the conventional construction mode has many problems. The hoisting method mainly adopts large-scale machinery block hoisting, and has the advantages that the technical content is low, but the problems that the large-scale machinery has high requirements on the field, particularly the safety of a supporting structure at the lower part of the machinery is involved, and meanwhile, a large number of supporting frames are required for block hoisting, and due to the particularity of an arch structure form, the supporting amount is larger than that of a flat plate structure, and the economy is poor; the great problem of horizontal thrust can exist in the promotion method, if not handle, can have great horizontal displacement at promotion in-process structure, and whole structure presents the state of lying prone outside warping down, and the mode of addding horizontal cable is generally considered to be restricted horizontal thrust in this problem conventional processing mode, nevertheless can bring that cable connected node is complicated, the cable needs stretch-draw to be handled and assemble the too high scheduling problem of bed-jig. The sliding method firstly needs a place to be capable of arranging a proper sliding track, secondly needs to ensure that the sliding surface of the stay cable has no other structure while considering the sliding scheme, and otherwise, the stay cable cannot slide in place due to interference, so that strict limitation requirements are arranged on the lower structure of the large-span roof.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a close hanging point lifting construction method for a large-span arch-shaped roof, which solves the problem of horizontal thrust which is difficult to process by a conventional method in the construction process of a large-span arch-shaped structure and avoids the complicated process of additionally arranging a stay cable. The hoisting adopts a close hoisting point form, the structure butt joint precision is high, the structure assembling height is reduced, the jig frame measure quantity and the high-altitude operation quantity are well reduced, and the construction safety is guaranteed.
In order to achieve the purpose, the invention provides the following technical scheme: a construction method for lifting dense hanging points of a large-span arched roof comprises the following steps: determining a structural area capable of serving as a lifting unit according to project steel structure roof arrangement and lower structure distribution, wherein the lifting unit is lifted in a multi-time accumulated mode according to roof curvature and lower civil engineering floor distribution;
(2) arranging lifting point positions according to the principle of close lifting point arrangement after the range of the accumulated lifting area is divided, firstly arranging the lifting point positions at the central axis, then arranging the lifting point positions at two sides according to the principle of symmetrical arrangement, and determining the number of the point positions mainly according to calculation;
(3) after the lifting point positions are determined, lifting frames are arranged according to the size and the shape of the structural grid, two lifting hanging points are arranged at one lifting point position, the point positions are further densely distributed, so that the counter force of the lifting point positions is reduced, and the lateral deformation of the structure is controlled;
(4) assembling the rod pieces in the lifting area at the lower part corresponding to the floor elevation area, firstly lifting the first lifting unit to the assembling position of the second lifting unit, and connecting the first lifting unit and the second lifting unit together to lift upwards;
(5) and (4) butting the subsequent lifting units in the same manner, and finally lifting the whole lifting area to the designed elevation.
Because the lifting adopts a close lifting point form, the lifting amount of each point can be controlled in a differentiation manner by adjusting hydraulic equipment in the lifting process, and meanwhile, the lifting counter force is controlled within a controllable range, so that the deflection of the cantilever end of the lifting structure is adjusted, two sides of the final lifting area are basically at the same elevation when the final lifting area is in butt joint with the lifting area, and the rod supplementing precision is improved. And after the rods in the two areas are supplemented, the lifting frame is unloaded, and the structure is installed completely.
Further, the distribution principle of lifting point positions of the dense lifting points in the step (2) is that the horizontal displacement of the lifting structure under the action of the partial lifting point positions under the condition of self-weight load is controlled within 10mm, and meanwhile, the stress of the structural rod piece meets the standard requirement.
Furthermore, the lifting area is determined, the roof structure can be divided into a lifting area and a hoisting area according to the arrangement condition of the roof structure of each project, and the method is applicable to construction operation of roofs with various structures.
Furthermore, the lifting area is divided in a plurality of accumulated times, and the building floors can be divided according to civil engineering floors at the lower part of the roof, so that the building floors are respectively assembled at different elevation floors, and a large number of assembling jig frames are avoided being erected.
Further, the lifting point positions are arranged, because the span height of the arch structure is the largest, the point positions at the central axis are required to be as few as possible, and the point positions at the outer side are required to be as many as possible.
Furthermore, the hoisting points of the dense hoisting points are judged according to the sizes of the structural members of the roof, and are arranged at the position of a larger member as much as possible.
Furthermore, the design of the lifting frame is smaller than the size of the grid, the post-compensation amount of the rod piece at the position of the subsequent lifting frame is reduced, and a single-support lattice lifting frame or a shoulder-pole type lattice lifting frame can be adopted according to the size of the grid gap.
Further, the arrangement of the lifting frame should be adjusted according to the shape of the grid, and the angle can be adjusted in a rotating mode to adapt to the shape of the grid.
Furthermore, multiple lifting points at the lifting frame should be symmetrically arranged as much as possible, so that the stress on two sides of the lifting frame is balanced.
Furthermore, each lifting point position lifting height in the lifting process should be analyzed differentially, the overhanging end should be higher than the inner side, two sides are at the same elevation when the compensation rods are connected, and the mounting precision is improved.
In conclusion, the horizontal thrust problem which is difficult to process by a conventional method in the construction process of the large-span arch structure is solved, the complicated process of adding the stay cable is avoided, and meanwhile, the arrangement mode of the dense hanging points of the shoulder-pole-type lattice lifting frame can effectively reduce the replacement of the rod pieces, improve the butt joint precision of the structure and reduce the measure cost; in addition, the structure assembling height is reduced, the jig frame measure quantity and the high-altitude operation quantity are reduced well, and the construction safety is guaranteed. Has the following beneficial effects:
(1) the construction method combines the hoisting and lifting processes, has less requirements on construction sites, has strong applicability, and can be adopted by conventional large-span arch structures;
(2) the construction method solves the problem of horizontal thrust in the construction state of the large-span arch structure, does not need to additionally apply a balancing measure, and is simple in field operation;
(3) the construction method has less rod replacement, avoids the structural rechecking workload brought by replacing the rod, and avoids the influence on the construction period caused by the fact that the rod needing to be replaced can be clearly determined after the construction scheme is determined;
(4) the construction method is simple in operation, convenient to install and dismantle and capable of being repeatedly used;
(5) the construction method has strong adjustability and strong response capability to special conditions possibly occurring in the construction process.
Drawings
FIG. 1 is an isometric view of an arch according to the present invention;
FIG. 2 is a sectional view of the dome of the present invention;
FIGS. 3-7 are flow charts of the present invention for the construction of an arch structure;
fig. 8 is a schematic structural view of a close-lift point lifting frame according to the present invention.
Detailed Description
An embodiment of a construction method for lifting a dense suspension point of a large-span arched roof according to the present invention will be further described with reference to fig. 1 to 8.
A construction method for lifting dense hanging points of a large-span arched roof comprises the following steps:
(1) the roof structure is divided into a hoisting unit 2 and a lifting unit 3 according to the shape of the large-span arch roof 1 and the distribution of lower floors. The hoisting unit 2 is located at the periphery of the structure and mainly comprises areas which cannot be hoisted, such as a roof support area, an outer cantilever area and the like, the hoisting unit 3 is mainly a mid-span and large-span arch area and mainly determined according to whether a lower floor can be used as an assembling operation surface or not, and meanwhile, the hoisting unit can be divided into one-time or multiple-time hoisting areas according to different elevations of the lower floor.
(2) The method is characterized in that firstly, a hoisting machine is adopted to construct an outer side hoisting area roof structure, and the construction is mainly carried out by adopting a peripheral hoisting machine, so that the model of the crane can be reduced to a greater extent.
(3) The first sub-blocks 4 are assembled and lifted at the level of the ground, and the corresponding lifting frames 5 are arranged at the same time. The lifting point positions are arranged according to a close lifting point principle, the quantity is mainly obtained through calculation, the principle is that under the existing point position state, the horizontal displacement of a lifting unit is controlled within 10mm, meanwhile, the internal force of a rod piece near the lifting point in the lifting process is controlled, the rod piece meets the standard requirement, the rod piece does not need to be replaced basically, and repeated calculation and drawing change caused by rod piece replacement are avoided.
The lifting frame 5 mainly comprises a support frame body 15, a lifting beam 9 and a lateral stabilizing rod piece 10, wherein an upper lifting point is arranged at the upper part of the beam and mainly used for fixing a lifter 11 and the support frame body 15, a steel strand 12 penetrates through the lifting beam and is connected to a lifting appliance 13, and the lifting appliance 13 is connected with a lower lifting point 14. The size and the arrangement of the lifting frame body are mainly determined by the size of the grid of the roof, a single-support frame body is arranged when the grid size is small, the two sides of the beam at the top of the frame body are provided with the lifters, and the form of a carrying pole type double-support frame body is considered to be arranged when the grid size is large. Meanwhile, the support frame body is rotated according to the grid shape distribution, so that the number of the post-compensating rod pieces is minimum.
(4) The corresponding lifting frame 5 is arranged at the second elevation position while the second sub-blocks are assembled. The first segment is then lifted to the second segment elevation to form an accumulated lift unit 6. The lifting height of each lifting point is controlled in the lifting process, the outer lifting point is high relative to the inner lifting point, the lifting overhanging area reaches the elevation in the design state under the action of the dead weight, the butt joint precision is improved, the specific height difference of the lifting points is obtained through calculation, and the principle is that the overhanging area is 0mm compared with the deflection in the design state under the action of the dead weight.
(5) The hoisting units 7 are accumulated in the same construction manner.
(6) Finally, a connecting rod between the hoisting area and the lifting area is supplemented, the lifting frame is unloaded, and the installation of the arch roof structure is completed
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A construction method for lifting dense hanging points of a large-span arched roof is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
(1) determining a structural area capable of serving as a lifting unit according to project steel structure roof arrangement and lower part structure distribution, wherein the lifting unit is lifted in a multiple accumulated mode according to roof curvature and lower civil engineering floor distribution;
(2) arranging lifting point positions according to the principle of close lifting point arrangement after the range of the accumulated lifting area is divided, firstly arranging the lifting point positions at the central axis, then arranging the lifting point positions at two sides according to the principle of symmetrical arrangement, and determining the number of the point positions mainly according to calculation;
(3) after the lifting point positions are determined, lifting frames are arranged according to the size and the shape of the structural grid, two lifting hanging points are arranged at one lifting point position, the point positions are further densely distributed, so that the counter force of the lifting point positions is reduced, and the lateral deformation of the structure is controlled;
(4) assembling the rod pieces in the lifting area at the lower part corresponding to the floor elevation area, firstly lifting the first lifting unit to the assembling position of the second lifting unit, and connecting the first lifting unit and the second lifting unit together to lift upwards;
(5) and (4) butting the subsequent lifting units in the same manner, and finally lifting the whole lifting area to the designed elevation.
2. The method for hoisting construction of the sealing and hanging point of the long-span arched roof as claimed in claim 1, wherein: the principle of arranging the hoisting point positions of the dense hoisting points in the step (2) is that the horizontal displacement of the hoisting structure under the action of the hoisting point positions is controlled within 10mm under the condition of self-weight load, and meanwhile, the stress of the structural rod piece meets the standard requirement.
3. The method for hoisting construction of the sealing and hanging point of the long-span arched roof as claimed in claim 1, wherein: the lifting area is determined, the roof structure can be divided into a lifting area and a hoisting area according to the arrangement condition of the roof structure of each project, and the method is applicable to construction operation of roofs with various structures.
4. The method for hoisting construction of the sealing and hanging point of the long-span arched roof as claimed in claim 1, wherein: the multiple accumulated lifting area division can be realized according to the civil engineering floor division at the lower part of the roof, so that the building blocks are respectively assembled at floors with different elevations, and the erection of a large number of assembling jig frames is avoided.
5. The method for hoisting construction of the sealing and hanging point of the long-span arched roof as claimed in claim 1, wherein: and the lifting point positions are arranged, because the midspan height of the arch structure is the largest, the point positions at the central axis are fewer, and the point positions at the outer side are more.
6. The method for hoisting construction of the sealing and hanging point of the long-span arched roof as claimed in claim 1, wherein: the lifting point position of the dense lifting point is judged according to the size of the structural member of the roof and is arranged at the position of the larger structural member.
7. The method for hoisting construction of the sealing and hanging point of the long-span arched roof as claimed in claim 1, wherein: the design of the lifting frame is smaller than the size of the grid, the post-compensation amount of the rod piece at the position of the subsequent lifting frame is reduced, and a single-support lattice lifting frame or a shoulder-pole type lattice lifting frame can be adopted according to the size of the grid gap.
8. The method for hoisting construction of the sealing and hanging point of the long-span arched roof as claimed in claim 1, wherein: the arrangement of the lifting frame is adjusted according to the shape of the grid, and the angle can be adjusted by rotating to adapt to the shape of the grid.
9. The method for hoisting construction of the sealing and hanging point of the long-span arched roof as claimed in claim 1, wherein: multiple lifting points at the lifting frame are symmetrically arranged, so that the stress on two sides of the lifting frame is balanced.
10. The method for hoisting construction of the sealing and hanging point of the long-span arched roof as claimed in claim 1, wherein: the lifting height of each lifting point position in the lifting process is analyzed differentially, the overhanging end is higher than the inner side, two sides are at the same elevation when the compensation rods are connected, and the mounting precision is improved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111635345.0A CN114215366B (en) | 2021-12-29 | 2021-12-29 | Lifting construction method for dense hanging points of large-span arched roof |
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| CN202111635345.0A CN114215366B (en) | 2021-12-29 | 2021-12-29 | Lifting construction method for dense hanging points of large-span arched roof |
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| CN114215366B CN114215366B (en) | 2023-03-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116044175A (en) * | 2022-12-21 | 2023-05-02 | 中交建筑集团有限公司 | Intelligent multipoint lifting construction scheme determining method and system |
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| CN113235947A (en) * | 2021-06-04 | 2021-08-10 | 中国建筑第四工程局有限公司 | Construction method of ultrahigh large-span huge ribbed space folded plate-shaped grid structure steel shed |
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2021
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Patent Citations (6)
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| JP2002129748A (en) * | 2000-10-27 | 2002-05-09 | Taisei Corp | Lifting method for long span roof |
| CN101586400A (en) * | 2008-05-22 | 2009-11-25 | 中国十五冶金建设有限公司 | Blocking partition adding type lift installation method of net rack |
| CN106812328A (en) * | 2015-11-27 | 2017-06-09 | 天津三建建筑工程有限公司 | The overall two step lifting construction methods of a string prestressed steel structure rack with hanging layer |
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| CN113235947A (en) * | 2021-06-04 | 2021-08-10 | 中国建筑第四工程局有限公司 | Construction method of ultrahigh large-span huge ribbed space folded plate-shaped grid structure steel shed |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116044175A (en) * | 2022-12-21 | 2023-05-02 | 中交建筑集团有限公司 | Intelligent multipoint lifting construction scheme determining method and system |
| CN116044175B (en) * | 2022-12-21 | 2023-11-14 | 中交建筑集团有限公司 | Intelligent multipoint lifting construction scheme determining method and system |
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